Critical Value Calculator

Find z, t, chi-square, and F critical values for hypothesis tests and confidence intervals. Choose distribution, degrees of freedom, confidence level, and tails to get exact cutoffs.

100% FreeZ / t / χ² / F distributionsConfidence Interval Planning

Distribution Settings

Select distribution and enter degrees of freedom where required

Distribution

Confidence level (%)

Enter between 50 and 99.99.

Tail selection

How to use this critical value calculator

Choose your distribution, confidence level, and degrees of freedom. Click "Calculate critical value" to get the cutoff used in hypothesis tests.

Frequently Asked Questions

A critical value is the cutoff point on a probability distribution that separates the rejection region from non-rejection in hypothesis testing. If your test statistic exceeds the critical value, you reject the null hypothesis.

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